The boys escorted me about the town, then back to the river, and got in their boat and came down to the bend, where they could see me go through the whirlpool and pass the binocle (I am not sure about the orthography of the word, but I suppose it means a double, or a sort of mock eddy).

This translation is very free, but one who wants to know these windows must read the whole article, and read it here in the church, the Dictionary in one hand, and binocle in the other, for the binocle is more important than the Dictionary when it reaches the complicated border which repeats in detail the colour-scheme of the centre: --

Above them the man who worked in 1200 to carry out the harmony, and to satisfy the Virgin's wishes, has filled his rose with a dozen or two little compositions in glass, which reveal their subjects only to the best powers of a binocle.

He has filled the centre with medallions as rich as he could make them, and these he has surrounded with borders, which are also enriched to the utmost; but these medallions with their borders spread across the whole window, and when you search with the binocle for the outside border, you see its pattern clearly only at the top and bottom.